Development of Learning Devices for Powers and Root Forms based on Problem Based Learning Models with a Scientific Approach in Class IX

This article presents the application of one of the procedures for developing learning tools on the material of Powers and Root Forms and presents the results of developing tools that meet the criteria of being valid, practical and effective. The learning tool about powers and roots that was developed was based on the Problem Based Learning model using a scientific approach for class IX students and was carried out at SMP Negeri 2 Tahuna. The learning device development procedure used in this study was adapted from the development design model developed by Thiagarajan and Semmel (1974) which consisted of 4 stages, namely define, design, develop and desseminate which was adapted by eliminating the 4th stage. After passing the 3 (three) stages of development and 2 (two) rounds of validation and testing, the learning materials for Powers and Root Forms for Class IX students were obtained that met the valid, practical and effective criteria.